368 ^^^ Philippine Journal of Science i9i» 



the uppermost sheath scarcely inflated, the rachis rather fragile, 

 its joints about 4 mm long, deeply sulcate on one side, the mar- 

 gins prominently white-bearded, obliquely cucullate at their tips. 

 Spikelets green or green and purple, the sessile ones perfect, Ian 

 ceolate, about 9 mm long ; first glume firm, lanceolate, acuminate, 

 9 mm long, 2-keeled, the margins inflexed ; second glume thinner, 

 7 mm long, acuminate, keeled above and with a slender, 10 to 

 12 mm long, apical awn; third glume hyaline, oblong, 5 mm 

 long; fourth glume hyaline, 4 mm long, cleft, about 1 mm wide, 

 the awn geniculate, about 3 cm long. Pedicelled spikelets lan- 

 ceolate, acuminate, about 8 mm long, not awned, their pedicels 

 3 to 3.5 mm long, sulcate, margins bearded; first glume lanceo- 

 late, acuminate, 2-keeled, usually 7-nerved, the inflexed margins 

 ciliate in the upper part; second glume as long as the first one, 

 hyaline, 1-nerved ; third and fourth glumes shorter and narrower, 

 the latter subtending a staminate flower. 



Luzon, Ilocos Norte Province, Burgos, Bur. Sci. 32946 (type) , 

 32755 Ramos, July, 1918, growing on open, dry, rocky slopes 

 at low altitudes. 



This species is well characterized by its solitary, long-exserted 

 racemes and is distinctly anomalous in the section Arthrolepis 

 by this character and also by its sulcate rachis-joints and pedi- 

 cels ; the second glume of the sessile spikelet is long-awned and 

 hence the present species cannot be placed in any of the other 

 subgenera of the series Isozygi. The sessile spikelets are all 

 alike throughout the entire length of the raceme, hence it can- 

 not be placed in any of the subgenera of the series Heterozygi. 

 So far as I am able to determine it is most closely allied to 

 Andropogon longipes Hack., of British India, from which it is 

 readily distinguished by its solitary racemes as well as by its 

 floral characters. 



ANDROPOGON GRYLLUS Linn. var. PHILIPPINENSIS var. nov. 



Glaberrima, circiter 75 cm alta; foliis 15 ad 27 cm longis, 



5 mm latis; paniculis oblongis 12 ad 15 cm longis, purpureis, 

 rachibus ramulisque laevis; spiculis lanceolatis, ^ circiter 6 

 mm longis, callo 1.5 mm longo, fulvo-barbato, gluma II breviter 

 aristata, arista 2 ad 3.5 mm longa, $ lineari-lanceolatis, 5 ad 



6 mm longis, vacuis, gluma II acuminata, vix aristata. 

 Panay, Capiz Province, Jamindan, Bur. Sci. 30964 Ramos & 



Eduno, April 10, 1918, on bowlders and ledges in stream beds, 

 observed only in this habitat. 



Andropogon gryllus Linn, extends from southern Europe to 

 Australia and was recorded from the Philippines by F.-Villar, 

 Novis. App. (1883) 316, as Chrysopogon gryllus Trin. The typi- 



